Analisis kinerja penggunaan modulasi QPSK, 8PSK, 16QAM pada satelit Telkom-1

Ariyanti, Sri; Purwanto, Budi Agus

doi:10.17933/bpostel.2013.110104

Cited by 4 publications

(9 citation statements)

References 1 publication

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“…Pengkodeannya menggunakan FEC coding. FEC akan menambah jumlah bit yang dikirim sehingga bit rate meningkat tetapi tidak memperpanjang waktu transmisi [3].…”

Section: A Bandwidth Dan Powerunclassified

Analisis Utilisasi Bandwidth dan Power Pada Modulasi QPSK Transponder Extended C-Band Transmisi Loopback Pada Satelit Telkom 3S

Faizah

2021

J. Telecomm. Electr. Control Eng.

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Sistem komunikasi satelit memiliki jangkauan yang sangat luas. Bandwidth dan power merupakan sumber daya yang terbatas dan mahal sehingga diperlukan adanya optimalisasi utilisasi bandwidth dan power, kondisi optimalisasi adalah apabila perbandingan persentase jumlah carrier bandwidth dan power 1:1. Kondisi optimalisasi dipengaruhi oleh perhitungan link budget, penggunaan modulasi yang tepat dan pengaturan FEC. Teknik modulasi QPSK, dengan FEC yang digunakan adalah ¾, 7/8, dan 0,93 menggunakan antena Hub 9 m dan VSAT SCPC berdiameter 2,4 m dan data rate sebesar 1024 kbps. Berdasarkan hasil penelitian ini didapatkan hasil perbandingan jumlah carrier bandwidth dan jumlah carrier power pada modulasi QPSK yang paling baik untuk digunakan adalah pada FEC 0,93 sekalipun belum mencapai kondisi optimalisasi dengan nilai persentase yang dihasilkan sebesar 65,7 %. Sedangkan, FEC yang paling buruk untuk digunaan adalah FEC ¾ dengan hasil persentase sebesar 52,2 %. Keywords: Satelit Telkom 3S, Bandwidth, Power, FEC, QPSK.

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“…Pengkodeannya menggunakan FEC coding. FEC akan menambah jumlah bit yang dikirim sehingga bit rate meningkat tetapi tidak memperpanjang waktu transmisi [3].…”

Section: A Bandwidth Dan Powerunclassified

Analisis Utilisasi Bandwidth dan Power Pada Modulasi QPSK Transponder Extended C-Band Transmisi Loopback Pada Satelit Telkom 3S

Faizah

2021

J. Telecomm. Electr. Control Eng.

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“…The coding uses FEC coding. FEC will increa se the number of bits sent so that the bit rate increases but does not extend the transmission time [4] BWocc=…”

Section: A Bandwidth and Powermentioning

confidence: 99%

“…Information : DR : Data Rate (kbps) FEC : Forward Error Correction [3] Mod : Modulation α : Roll-off factor (0 ≤ α ≤ 1) [4] In terms of bandwidth, it could be seen the number of carriers in one transponder that could be formulated as follows [4]…”

Section: A Bandwidth and Powermentioning

confidence: 99%

“…The 8-PSK or Eight-state Phase Shift, Keying modulation technique, undergoes a phase change of 45 ○ derived from the value of m = 3, 2 m = 2 3 = 8 and then 360°8 = 45° so tha t the phase size produced by modulation 8 -PSK is 45 ○ . The information bitrate is 3 times the speed of the symbol, in 8-PSK modulation it presents eight phases for eight symbols, with one symbol consisting of 3 bits, namely "000", "001", "011", "010", "110", "111", "101" and "100" [4]…”

Section: -Psk Modulation Techniquementioning

confidence: 99%

“…The result is that the most appropriate modulation used on the Telkom -1 satellite for IDR services is the QPSK modulation technique that uses 3-meter antenna diameters, and the worst modulation used on the Telkom -1 satellite is the 16QAM modulation technique. The transponder capacity will be even greater when using a high-order modulation, this is viewed in terms of bandwidth, whereas if viewed in terms of power, the higher the modulation order, the smaller the transponder capacity [4].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Utilization Bandwidth and Power Transponder Extended C-Band On The Satellite Telkom 3S VSAT SCPC

Romadhona¹,

Faizah²,

Budi³

2020

INFOTEL

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On satellite communication systems, bandwidth and power are limited and expensive resources. Optimization of bandwidth and power utilization in Telkom 3S Satellite could be achieved if the ratio value of the percentage of bandwidth and power is 1: 1. The optimization conditions are influenced by the calculation of the link budget, the use of appropriate modulation and FEC settings. QPSK and 8-PSK modulation techniques with FEC used are ¾, 7/8, and 0.9 with a 9 m Hub antenna and VSAT SCPC with a diameter of 2.4 m and the same data rate of 1024 kbps. Based on the results of this research, the lower the modulation technique used, the lower the ratio of bandwidth and power. The most optimal FEC value to be used is 8-PSK modulation at FEC 0.93 with the resulting percentage is 97.25%, where the total carrier bandwidth generated is 93.415, and the amount of carrier power is 96.05, while the worst is modulation QPSK is at the FEC of 3/4 by producing a percentage of 35% which falls into the limited power category. Thus, the most appropriate modulation used on the Telkom 3S Satellite is the 8-PSK modulation with an FEC of 0.93.

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Software-based simulation to analyze the variation of digital modulation and atmospheric condition on the free space optic (FSO) link performance

Khair¹,

Zulherman²,

Auliana³

2022

J.INFOTEL

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Free Space Optic (FSO) is the solution for telecommunications technology that offers high data rates, wide bandwidth, and low power consumption. However, to maximize the performance of the FSO system, the modulation used should be considered in environmental conditions. This study aims to compare the performance of the FSO communication link based on digital modulation variations used in various weather conditions, including sunny, rainy, and foggy weather. This study uses two attenuation models, namely the Kim and Kruse models, with variations in transmission distance from 500 meters to 10 kilometers. Modulation variations used include QPSK, 8-PSK, 16-PSK, and 16-QAM at 10 Gbps bitrate. The simulation is accomplished using OptiSystem 17.0 software. The study results show that sunny weather (very clear) has the best visibility compared to rain and fog conditions with an attenuation value of 0.46 dB/km on the Kim and Kruse models. QPSK modulation has the best performance with a BER value of less than 1x10-12 up to a transmission distance of 8 km in sunny weather, 3 km in rainy weather (medium rain), and 800 m in foggy (moderate fog) weather. The 8-PSK modulation has a BER value of less than 1x10-12 with a range of 2000 m in sunny weather and 1500 m in rainy weather but does not meet the standards in foggy weather conditions. 16-PSK and 16-QAM modulation have above baseline BER values during rainy and foggy conditions, but 16-QAM modulation still has a BER value of less than 1x10-3 during foggy conditions at a distance of 500 m.

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Analisis kinerja penggunaan modulasi QPSK, 8PSK, 16QAM pada satelit Telkom-1

Cited by 4 publications

References 1 publication

Analisis Utilisasi Bandwidth dan Power Pada Modulasi QPSK Transponder Extended C-Band Transmisi Loopback Pada Satelit Telkom 3S

Analisis Utilisasi Bandwidth dan Power Pada Modulasi QPSK Transponder Extended C-Band Transmisi Loopback Pada Satelit Telkom 3S

Analysis of Utilization Bandwidth and Power Transponder Extended C-Band On The Satellite Telkom 3S VSAT SCPC

Software-based simulation to analyze the variation of digital modulation and atmospheric condition on the free space optic (FSO) link performance

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